Seth l



ssrn I.. BEGKWITH, or SAN FRANcIsod CALIFORNIA.,

Leners Paten: No. 74,281, dated February 11, 1868.

Inraovrn APPARATUS ros WASHING GOLD oars.

@te Srlgehule :stemt tu in tiges tttms prima mit making pitt at the sauts.

To ALI. WHOM IT MAY ooNcEnN: l

l Be it known that I, SETH L. Bncxwrrrnof San Francisco, in the county of San Francisco, andV State of California, have invented a new and improved GoldWashing Machine; and I do hereby declare 'that the following isa full, clear, and exact description thereof, vwhich will enable those skilled in the art to uiakeand l use the same, reference being had tothe accompanying drawings, forming part of this 'spcicatlom This invention relates to a gold-washing machine, and consists of a washer-pan, hung over a receiver,

between the same upright crank-shafts. A simultaneous rotary motion is imparted to the upright crank-shafts,

giving to the washer and receiver-pans the peculiar swinging motion adopted in metallurgiofm'echanical separa.-V t1on or washing. The washer-pan distributes the earth or gravel, allows the ner particles 'to pass through withV the water, which it pours by its funnel-shaped underportion 'into the centre of the receiver where it is washed, its overiiow, carry-ing with it the earth andxgravel washed to the surface, passes from the inner chambers to the outer, the gold operated upon being retained by its gravity aswell as by the overhangng rims,laud

`inally overiows into the outermost vessel, whence it escapes to the ground." This machine is, also adapted to dry mechanical separation. In the accompanying drawing- Figure 1 is alfront view, partly in section, of my improved goldfwavshing machine, and v Fig-ure 2 is a longitudinal section thereof, at line :v a: of iig. 1, with part of the Washer-pan bro'kenfaway to show the lower or receiver-pans. y I

Similar letters of reference indicate corresponding parts. p A A'is the framing, in which the parts of my gold-washing machine are disposed. The upright crank-v shafts B B are journalled at a and a, and lare Arotated by a power applied to .the driving-pulley C, or crank C',

through the bevel or mitre-wheels D D el d. The washer and receiver-pans E F G are hung at axialpoints upon the crank-shafts B, and a rotary motion being imparted to the crank-shafts, every pointinl the washer and receiver-pans describes a circle, whose radius is equal'to the stroke of the crank-shafts B, while the 'gure described by the periphery of each pan isa circle of radius exceeding its own bythe length of stroke of the crank-shafts. vThe washer-pan E has two bottoms, the upper 4one arched and perforated, the lower iunneh4 shaped, and 'having an opening at'its lowest and central portion, as seen in g. 1. The auriferous earth being placed in pan E, and water poured on, the gold, by its greater specific gravity, fallsto the bottom and sides, while the ner particles of earth and gravel, carrying with them some of the gold, are passed with the water through the funnel-shaped bottom e into the central chamber f of 1 the pan F, which hangs by kthe crane-arms or brackets f', appended tothe supporting-bar H, upon the fixed collars g, on the crank-shafts B. The rims separating the chambers ofthe pan F are crowned by an overlapping ridge, as seen in fig. 1 at The continued swinging rotary motion of the pans-assists the gold in sinking to the bottom, while the earth and gravel rise to the top, andwithl the water overow'into the next chamber,` and so on to the outermost chamber of pan F, whence they escape into Galand thence, when nally sifted, the earth, gravel, andwater, pass away' through K. Or the operation may he performed without the use of water at all, with equal accuracy but less rapidity. y

l I claim as new, and desire to secure by Letters latent- 1. The device for imparting to the pans E F Gr the peculiar swinging motion used for separating metals when only mechanically mixed, by hanging them to rotating upright crank-shafts, in manner substantially. as and for the purposes above set fortl and described.- I f 2. Thevpan E, provided with a double bottom, whereof the upper one-is arched and perforated, and the lower funnel-shaped, in manner substantially as above set forth and described.

3. The pan F, divided into chambers, substantially as above described,lthe walls whereof are crowned by the overhanging ridges b, in manner substantially as above set forth and described.

ssrn I..` BscKwIrn.

Witnesses:

OLI/vsn Coorss, GEORGE H. GABLEY. 

